relay

Abstract

The application provides a relay and relates to the technical field of electronic control devices. The relay comprises a base and an armature assembly. The base is provided with a rotating shaft and an iron core, and the iron core has an attraction surface. The armature assembly comprises an injection molding part and an armature partially covered in the injection molding part. The injection molding part is provided with a shaft hole, and the armature assembly can rotate relative to the rotating shaft. The shaft hole and the rotating shaft have a contact area. The shaft hole and the rotating shaft only contact at the contact area. Through electromagnetic attraction, the armature assembly can swing around the contact area relative to the attraction surface, thereby realizing self-correction. When the armature assembly rotates to the right position relative to the rotating shaft, at least one vertical line on the surface of the armature facing the attraction surface is parallel to the attraction surface. On the one hand, the magnetic leakage can be reduced, and the magnetic efficiency can be improved. On the other hand, the voltage value fluctuation when multiple actions are performed can be reduced, and the armature assembly can be aligned in the right position when the relay is tested in the right position and the inverted position.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic control devices, in particular to a relay. BACKGROUND

[0002] A relay is an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied in an automatic control circuit. The relay is actually a kind of "automatic switch" for controlling a larger current with a smaller current. Therefore, the relay plays a role in automatic adjustment, safety protection, and conversion of a circuit.

[0003] In the related art, the relay mainly includes a base, an iron core, and an armature assembly. The armature assembly rotates relative to a rotating shaft on the base to drive a moving spring part, so that the contacts are contacted or disconnected. When the center of gravity of the armature assembly deviates from the rotating shaft, the armature assembly is inclined due to its own gravity. When the armature assembly is rotated to a position, the surfaces of the armature and the iron core that are close to each other form an included angle, which causes serious magnetic leakage between the iron pieces and low magnetic efficiency, and a larger voltage is required to drive the relay. Although the armature can be restored by the magnetic attraction force during multiple operations, the voltage value fluctuates greatly during multiple operations. In addition, the inclination direction of the armature assembly is inconsistent during the upright test and the inverted test of the relay affected by gravity, which causes the direction of the included angle between the armature and the iron core to be inconsistent. For example, the intersection line between the two surfaces of the armature and the iron core that are close to each other is at the upper end or the lower end of the armature, which further causes the required electromagnetic attraction force and driving voltage to be different during the upright test and the inverted test. SUMMARY

[0004] The relay provided by the embodiment of the present application can prevent the surfaces of the armature and the iron core that are close to each other from forming an included angle when the armature assembly is rotated to a position, improve the magnetic efficiency, reduce the voltage value fluctuation during multiple operations, and ensure that the armature assembly can be restored during the upright test and the inverted test of the relay.

[0005] The relay provided by the embodiment of the present application includes a base and an armature assembly. The base is provided with a rotating shaft and an iron core, and the iron core has an attraction surface. The armature assembly includes an injection molding part and an armature partially covered in the injection molding part. The injection molding part is provided with a shaft hole, the rotating shaft is arranged in the shaft hole, and the armature assembly can rotate relative to the rotating shaft. The shaft hole and the rotating shaft are in contact only at a contact area between the shaft hole and the rotating shaft. The armature assembly can swing relative to the attraction surface around the contact area, so that when the armature assembly is rotated to a position relative to the rotating shaft, the surface of the armature facing the attraction surface has at least one vertical line parallel to the attraction surface, and the vertical line is parallel to the axial direction of the shaft hole.

[0006] According to some embodiments of the present application, a protrusion is arranged between the hole wall and the rotating shaft, at least a part of the protrusion is located in a radial direction of the hole wall parallel to a thickness direction of the armature, and a part between two ends of the hole wall is in contact with the rotating shaft through the protrusion.

[0007] According to some embodiments of the present application, the protrusion is connected with the hole wall of the shaft hole, and at least a part of the protrusion is in contact with the rotating shaft.

[0008] According to some embodiments of the present application, a surface of the protrusion is a curved surface, a radial distance between the curved surface and a circumferential surface of the rotating shaft first decreases and then increases along an axial direction of the rotating shaft, and a minimum radial distance between the curved surface and the circumferential surface of the rotating shaft is zero.

[0009] According to some embodiments of the present application, the curved surface is an arc surface, the arc surface is tangent to the circumferential surface of the rotating shaft.

[0010] The arc surface extends from one end of the hole wall to the other end, or the arc surface is located between two ends of the hole wall of the rotating shaft.

[0011] According to some embodiments of the present application, the curved surface comprises a first inclined surface, a connecting surface and a second inclined surface arranged continuously, the first inclined surface and the second inclined surface are arranged at an inclination angle, and the connecting surface is in contact with the rotating shaft.

[0012] According to some embodiments of the present application, the protrusion is integrally formed with the hole wall of the shaft hole.

[0013] According to some embodiments of the present application, the protrusion is connected with the rotating shaft, and the protrusion is in contact with a part between two ends of the hole wall.

[0014] According to some embodiments of the present application, a surface of the protrusion is a curved surface, a radial distance between the curved surface and the hole wall first decreases and then increases along an axial direction of the hole wall, and a minimum radial distance between the curved surface and a circumferential surface of the hole wall is zero.

[0015] According to some embodiments of the present application, the curved surface is an arc surface, the arc surface is tangent to a part between two ends of the hole wall.

[0016] According to some embodiments of the present application, the protrusion is integrally formed with the rotating shaft.

[0017] According to some embodiments of the present application, the protrusion is located at a middle position of the hole wall.

[0018] According to some embodiments of the present application, the protrusion comprises two sub-protrusions, and the two sub-protrusions are oppositely arranged along a radial direction of the hole wall, which is parallel to the thickness direction of the armature.

[0019] According to some embodiments of the present application, the protrusion is a ring-shaped protrusion.

[0020] According to some embodiments of the present application, the shaft hole is located on one side of the thickness direction of the armature, and the shaft hole is located between two ends of the length direction of the armature, wherein the length direction and the thickness direction of the armature are perpendicular to each other.

[0021] According to some embodiments of the present application, the axial length of the part of the hole wall in contact with the shaft is not greater than 0.2 mm.

[0022] According to some embodiments of the present application, the contact area is located between two ends of the axial direction of the hole wall of the shaft hole.

[0023] According to some embodiments of the present application, the armature comprises a first armature and a second armature, the first armature and the second armature are arranged in parallel and spaced apart along the thickness direction of the armature, the core is located between the first armature and the second armature, the core comprises a first core and a second core, the first core is located at a first end of the first armature and the second armature, and the second core is located at a second end of the first armature and the second armature.

[0024] The armature assembly can rotate around the shaft to rotate the armature assembly between a first position and a second position, wherein when the armature assembly is located at the first position, the surface of the first end of the first armature facing the attracting surface of the first core has at least one vertical line parallel to the attracting surface of the first core, and the surface of the second end of the second armature facing the attracting surface of the second core has at least one vertical line parallel to the attracting surface of the second core; when the armature assembly is located at the second position, the surface of the second end of the first armature facing the attracting surface of the second core has at least one vertical line parallel to the attracting surface of the second core, and the surface of the first end of the second armature facing the attracting surface of the first core has at least one vertical line parallel to the attracting surface of the first core.

[0025] According to some embodiments of the present application, the base is provided with a coil holder, the core is connected with the coil holder; the core is provided with a magnetic isolation part, the armature can be overlapped with the magnetic isolation part; the magnetic isolation part is welded with the core, or the magnetic isolation part is integrally formed with the coil holder.

[0026] One embodiment of the above invention has at least the following advantages or beneficial effects:

[0027] The relay of this invention has a contact area between the shaft hole and the rotating shaft. Since the shaft hole and the rotating shaft only contact each other within this contact area, interference between the rotating shaft and the hole wall is reduced. When the armature assembly tilts due to gravity, it can swing relative to the contact surface around the contact area via electromagnetic attraction, thus achieving self-correction. This ensures that when the armature assembly rotates to its correct position relative to the rotating shaft, at least one vertical line on the surface of the armature facing the contact surface is parallel to the contact surface. Because at least one vertical line on the surface of the armature facing the contact surface is parallel to the contact surface, magnetic leakage is reduced, improving magnetic efficiency. Furthermore, it reduces voltage fluctuations during multiple operations, preventing the intersection line between the two surfaces of the armature and the iron core from being at the upper or lower end of the armature. This ensures that the armature assembly is correctly positioned during both upright and inverted tests. Attached Figure Description

[0028] Figure 1 The diagram shown is a structural schematic of a relay provided in an embodiment of the present invention;

[0029] Figure 2 The diagram shown is a structural schematic of the relay provided in an embodiment of the present invention from another perspective;

[0030] Figure 3 The diagram shown is a schematic diagram of another structure of the relay provided in an embodiment of the present invention;

[0031] Figure 4 The diagram shown is a schematic representation of a relay in a first position according to an embodiment of the present invention;

[0032] Figure 5 What is shown is Figure 4 A magnified view of a section at point C;

[0033] Figure 6 The diagram shown is a structural schematic of the magnetic shielding part in an embodiment of the present invention;

[0034] Figure 7 The diagram shown is a schematic diagram of another structure of the magnetic shielding part in an embodiment of the present invention;

[0035] Figure 8 The diagram shown is a schematic diagram of the structure of the armature assembly and the rotating shaft in an embodiment of the present invention;

[0036] Figure 9 What is shown is Figure 8 The main view;

[0037] Figure 10 What is shown is Figure 9 A cross-sectional view along line DD;

[0038] Figure 11 What is shown isFigure 9 A sectional view along line DD, where the axis of rotation is omitted;

[0039] Figure 12 What is shown is Figure 10 A magnified view of the fit between the rotating shaft and the shaft hole;

[0040] Figure 13 What is shown is Figure 10 Another enlarged view of the fit between the rotating shaft and the shaft hole;

[0041] Figure 14 What is shown is Figure 10 A third enlarged view of the mating of the rotating shaft and the shaft hole;

[0042] Figure 15 What is shown is Figure 8 Top view;

[0043] Figure 16 What is shown is Figure 15 A cross-sectional view along the EE line;

[0044] Figure 17 What is shown is Figure 16 A magnified view of the fit between the rotating shaft and the shaft hole;

[0045] Figure 18 The diagram shows the second sub-protrusion engaging with the shaft hole;

[0046] Figure 19 The second armature and Figure 7 The diagram shows the magnetic shielding part in the contact state.

[0047] The reference numerals in the attached figures are explained as follows:

[0048] 1-Base; 2-Armature assembly; 21-Injection molded part; 211-Shaft hole; 212-First sub-protrusion; 2121-Arc-shaped surface; 2122-First inclined surface; 2123-Connecting surface; 2124-Second inclined surface; 22-First armature; 23-Second armature; 3-Rotating shaft; 31-Second sub-protrusion; 41-First iron core; 411-First suction surface; 412-Second suction surface; 42-Second iron core; 43-Coil frame; 44-Magnetic shielding part; 51-First contact assembly; 511-First moving spring bracket; 512-First moving spring; 513-First stationary spring; 52-Second contact assembly; 521-Second moving spring bracket; 522-Second moving spring; 523-Second stationary spring. Detailed Implementation

[0049] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0050] See Figures 1 to 19 As shown, Figure 1 In the diagram, arrow X indicates the length direction of the armature, arrow Y indicates the height direction of the armature (i.e., the axial direction of the shaft hole 211), and arrow Z indicates the thickness direction of the armature. Arrows X, Y, and Z are perpendicular to each other, meaning the height, length, and thickness directions of the armature are mutually perpendicular. It should be noted that during the swinging and rotating process of the armature assembly, the height, length, and thickness directions of the armature will change; however, they will always remain perpendicular to each other. Figure 1 The armature assembly is in an upright position. At this time, the height direction of the armature is parallel to the axial direction of the rotating shaft 3, that is, the arrow direction Y is parallel to the axial direction of the rotating shaft 3. When the armature assembly swings or rotates, the height direction of the armature may not be parallel to the axial direction of the rotating shaft, that is, the arrow direction Y may not be parallel to the axial direction of the rotating shaft.

[0051] The relay in this embodiment includes a base 1 and an armature assembly 2. The base 1 is provided with a rotating shaft 3 and an iron core, and the iron core has a contact surface. The armature assembly 2 includes an injection molded part 21 and an armature partially covered in the injection molded part 21. The injection molded part 21 is provided with a shaft hole 211, and the rotating shaft 3 passes through the shaft hole 211. The armature assembly 2 can rotate relative to the rotating shaft 3. There is a contact area between the shaft hole 211 and the rotating shaft 3. The shaft hole 211 and the rotating shaft 3 only contact each other in the contact area, so that the armature assembly 2 can swing around the contact area relative to the contact surface. When the armature assembly 2 rotates to the position relative to the rotating shaft 3, the surface of the armature facing the contact surface has at least one vertical line parallel to the contact surface, wherein the vertical line is parallel to the axial direction of the shaft hole 211.

[0052] It should be noted that the vertical line of the armature's surface facing the attracting surface, which has at least one vertical line parallel to the attracting surface, can be the edge line of the armature, a part of the plane of the armature's surface facing the attracting surface, or any one or more vertical lines on the surface of the armature facing the attracting surface. The vertical line can be parallel to the attracting surface and in direct contact, parallel to the attracting surface and indirect contact, or parallel to the attracting surface but not in contact.

[0053] The relay of the embodiment has a contact area between the shaft hole 211 and the rotating shaft 3, and the shaft hole 211 only contacts the rotating shaft 3 at the contact area, so that the rotating shaft 3 and the hole wall can be reduced to interfere with each other. When the armature assembly 2 is tilted under the influence of gravity, the armature assembly 2 can swing around the contact area relative to the attraction surface in the direction of the arrow AB by the electromagnetic attraction, so as to realize self-correction, and further make the surface of the armature facing the attraction surface have at least one vertical line parallel to the attraction surface when the armature assembly 2 rotates to the position relative to the rotating shaft 3. Since the surface of the armature facing the attraction surface has at least one vertical line parallel to the attraction surface, on the one hand, the magnetic efficiency can be improved by reducing the magnetic leakage, and on the other hand, the voltage value fluctuation when multiple actions occur can be reduced, and the phenomenon that the intersection line between the two surfaces of the armature and the iron core that are close to each other is at the upper end or the lower end of the armature is avoided, so that the armature assembly can be adjusted to the correct position in the upright test and the inverted test.

[0054] In one embodiment, referring to Figure 1 The shaft hole 211 is located on one side of the thickness direction of the armature, and the shaft hole 211 is located between the two ends of the length direction of the armature.

[0055] In other embodiments, the shaft hole can also be located between the two surfaces of the armature opposite in the thickness direction.

[0056] For example, the cross-sectional shape of the shaft hole is circular, and the shaft hole has a certain depth, that is, the hole wall has a certain axial length, so that the hole wall has two ends arranged opposite in the axial direction.

[0057] In one embodiment, the contact area is located between the two ends of the axial direction of the hole wall of the shaft hole 211. In this way, the swing of the armature assembly 2 around the contact area can be more flexible, so that the self-correction effect is more obvious.

[0058] It should be noted that the contact area located between the two ends of the axial direction of the hole wall of the shaft hole 211 means that as long as there is a position in the space between the two end faces of the axial direction of the hole wall of the shaft hole 211 contacting the rotating shaft 3, and the armature assembly 2 can swing around the contact area relative to the attraction surface, and further realize that the surface of the armature facing the attraction surface has at least one vertical line parallel to the attraction surface when the armature assembly 2 rotates to the position relative to the rotating shaft 3. Since the size is difficult to guarantee in the actual production process, the position between the two ends of the hole wall of the shaft hole 211 and the rotating shaft 3 can be zero clearance fit, can be slightly interference fit, and can also have a slight gap. In the case that there is a slight gap between the two, due to the influence of the gravity of the armature assembly, there will also be a part contacting between the hole wall of the shaft hole 211 and the circumferential surface of the rotating shaft 3, that is, the contact area.

[0059] Since the shaft hole 211 only contacts the rotating shaft 3 at the contact area, the radial distance between the two ends of the hole wall in the axial direction and the circumferential surface of the rotating shaft 3 is greater than the radial distance between the positions of the two ends of the hole wall and the circumferential surface of the rotating shaft 3.

[0060] In the embodiment, the relay further comprises a magnetic circuit part and a contact part, the magnetic circuit part is composed of at least the armature assembly 2, the core, the coil and the coil holder 43, wherein the core and the coil holder are inserted into the base 1 after being injection molded together.

[0061] The contact part comprises a first contact assembly 51 and a second contact assembly 52, the first contact assembly 51 and the second contact assembly 52 are respectively located on both sides of the rotating shaft 3, and the first contact assembly 51, the second contact assembly 52 and the rotating shaft 3 are all located on the same side of the armature assembly 2.

[0062] The first contact assembly 51 comprises a first moving spring support 511, a first moving spring piece 512 and a first stationary spring piece 513, the first stationary spring piece 513 is fixedly installed on the base 1, the first moving spring support 511 is inserted into the base 1, and the first moving spring piece 512 is installed on the first moving spring support 511 and moves with the armature assembly 2. The second contact assembly 52 comprises a second moving spring support 521, a second moving spring piece 522 and a second stationary spring piece 523, the second stationary spring piece 523 is fixedly installed on the base 1, the second moving spring support 521 is inserted into the base 1, and the second moving spring piece 522 is installed on the second moving spring support 521 and moves with the armature assembly 2.

[0063] It should be noted that the structures of the first contact assembly 51 and the second contact assembly 52 are prior art and will not be described in detail here.

[0064] For example, referring to Figure 1 In the embodiment, the armature comprises a first armature 22 and a second armature 23, the first armature 22 and the second armature 23 are parallel and spaced apart along the thickness direction of the armature, and the core is located between the first armature 22 and the second armature 23, the core comprises a first core 41 and a second core 42, wherein the first core 41 and the second core 42 can be integrally formed or separately arranged; the first core 41 is located at the first end of the first armature 22 and the second armature 23, and the second core 42 is located at the second end of the first armature 22 and the second armature 23. Specifically, the first armature 22 and the second armature 23 are parallel and spaced apart along the arrow direction Z, the polar surface of the first armature 22 and the polar surface of the second armature 23 are opposite and both face the core. Referring to Figure 1 and Figure 2As shown, the magnetic attraction surfaces of the iron core include a first magnetic attraction surface 411 and a second magnetic attraction surface 412 disposed opposite to each other. The first magnetic attraction surface 411 is close to the first armature 22, and the second magnetic attraction surface 412 is close to the second armature 23. Both the first iron core 41 and the second iron core 42 have a first magnetic attraction surface 411 and a second magnetic attraction surface 412. That is, the pole surface of the first armature 22 is the surface of the first armature facing the first magnetic attraction surface 411 of the first iron core 41 and the second iron core 42, and the pole surface of the second armature 23 is the surface of the second armature facing the second magnetic attraction surface 412 of the first iron core 41 and the second iron core 42.

[0065] The armature assembly 2 also includes a permanent magnet located between the first armature 22 and the second armature 23, and the injection molded part 21 holds the first armature 22, the second armature 23 and the permanent magnet together.

[0066] By applying forward and reverse currents to the coil, the armature assembly 2 can rotate around the shaft 3, allowing it to rotate in a first position and a second position. That is, when the armature assembly 2 rotates to its designated position around the shaft 3, it is in either the first or second position. Because the armature assembly 2 can oscillate relative to the contact surface around the contact area, when the armature assembly 2 is in the first position, the first end of the first armature 22 (…) Figure 4 The surface of the second end of the second armature 23 facing the first contact surface 411 of the first iron core 41 has at least one vertical line parallel to the first contact surface 411 of the first iron core 41. Figure 4 When the armature assembly 2 is in the second position, at least one vertical line on the surface of the second end of the first armature 22 facing the second core 42 is parallel to the second contact surface 412 of the second core 42. At this time, the moving contact of the first moving spring 512 is in contact with the stationary contact of the first stationary spring 513, and the moving contact of the second moving spring 522 is separated from the stationary contact of the second stationary spring 523. When the armature assembly 2 is in the second position, at least one vertical line on the surface of the second end of the first armature 22 facing the second core 42 is parallel to the first contact surface of the second core 42, and at least one vertical line on the surface of the first end of the second armature 23 facing the first core 41 is parallel to the second contact surface of the first core 41. At this time, the moving contact of the first moving spring 512 is separated from the stationary contact of the first stationary spring 513, and the moving contact of the second moving spring 522 is in contact with the stationary contact of the second stationary spring 523.

[0067] Specifically, see Figures 1 to 5 As shown, when the armature assembly 2 is in the first position, on the pole surface of the first armature 22, at least one vertical line extending in the direction of arrow Y at the first end of the first armature 22 is parallel to the first contact surface 411 of the first core 41, and on the pole surface of the second armature 23, at least one vertical line extending in the direction of arrow Y at the second end of the second armature 23 is parallel to the second contact surface 412 of the second core 42.

[0068] When the armature assembly 2 is in the second position, on the pole face of the first armature 22, at least one vertical line extending in the arrow direction Y at the second end of the first armature 22 is parallel to the first attraction surface 411 of the second core 42, and on the pole face of the second armature 23, at least one vertical line extending in the arrow direction Y at the first end of the second armature 23 is parallel to the second attraction surface 412 of the first core 41.

[0069] In the embodiment, as shown in Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , the base 1 is provided with a coil holder 43, the core is connected with the coil holder 43, and the core passes through the hole of the coil holder 43 exemplarily; the attraction surface of the core is provided with a magnetic isolation part 44, and the armature is overlapped with the magnetic isolation part 44. The material of the magnetic isolation part 44 is plastic, and the magnetic isolation part 44 is integrally formed with the coil holder 43. In this way, the positioning accuracy of the magnetic isolation part 44 can be ensured, the magnetic isolation effect can be ensured, and displacement of the magnetic isolation part 44 caused by displacement of the coil holder 43 during armature beating can be avoided.

[0070] Specifically, the first attraction surface 411 and the second attraction surface 412 of the first core 41 and the first attraction surface 411 and the second attraction surface 412 of the second core 42 are all provided with the magnetic isolation part 44. By providing the magnetic isolation part 44, when the coil is energized to rotate the armature assembly 2 to a stable state, there is an air gap between the core and the armature, the electromagnetic force is reduced, and the relay can be normally released.

[0071] Since the material of the magnetic isolation part 44 is plastic, direct contact between the armature and the core can be avoided, and metal collision sound can be reduced.

[0072] In some embodiments, as shown in Figures 3 to 6 , the magnetic isolation part 44 is in the form of a thin plate and is attached to the attraction surface of the core. At this time, the armature assembly is rotated to the position relative to the rotating shaft, which means that the armature is in contact with the magnetic isolation part and stops rotating. In order to enhance the strength of the magnetic isolation part 44, a through hole can be provided on the core, the through hole penetrates the first attraction surface 411 and the second attraction surface 412, and during injection molding, the injection material is filled in the through hole, so as to connect the magnetic isolation parts 44 on the first attraction surface 411 and the second attraction surface 412 together, increase the contact area of the magnetic isolation part 44 and the core, and enhance the strength of the magnetic isolation part 44.

[0073] In other embodiments, as shown in Figure 7 , Figure 19As shown, the magnetic isolation portion 44 is formed on the side wall of the core close to the coil holder 43, and one end of the magnetic isolation portion 44 protrudes from the first attraction surface 411 of the core, and the other end of the magnetic isolation portion 44 protrudes from the second attraction surface 412 of the core. At this time, the rotation of the armature assembly to the position relative to the rotating shaft means that the armature directly contacts the attraction surface and stops rotating. Figure 19 As shown, a part of the surface of the second armature 23 facing the attraction surface of the second core is parallel to the attraction surface but not in contact with the attraction surface, and the part of the surface is composed of a plurality of vertical lines.

[0074] In other embodiments, as shown in Figure 1 and Figure 2 As shown, the material of the magnetic isolation portion 44 can be stainless steel, and the magnetic isolation portion 44 is welded to the core. Specifically, the first attraction surface 411 and the second attraction surface 412 of the first core 41 and the first attraction surface 411 and the second attraction surface 412 of the second core 42 are all welded with the magnetic isolation portion 44.

[0075] In some embodiments, taking the first armature 22 as an example, as shown in Figure 5 As shown, the thickness T of the first armature 22 gradually decreases from the position close to the injection molding part 21 of the first armature 22 to the free end of the first armature 22, and when the first armature 22 contacts the magnetic isolation portion 44, a part of the surface of the first armature 22 contacting the magnetic isolation portion 44 is parallel to the first attraction surface 411 of the first core 41, that is, the first armature 22 is parallel to the first attraction surface 411 of the first core 41 through the magnetic isolation portion 44.

[0076] It should be noted that the part of the first armature 22 lapping with the first attraction surface 411 of the core can also be the edge extending in the arrow direction Y on the pole surface of the first armature 22. For example, when the attraction surface of the core is not provided with a magnetic isolation portion, the part of the first armature 22 lapping with the first attraction surface 411 of the core is the edge extending in the arrow direction Y on the pole surface of the first armature 22. At this time, the rotation of the armature assembly to the position relative to the rotating shaft means that the armature directly contacts the attraction surface of the core and stops rotating.

[0077] In order to realize that the armature assembly 2 can swing relative to the contact area of the attraction surface, and when the armature assembly 2 rotates to the position relative to the rotating shaft 3, at least one vertical line of the surface of the armature facing the attraction surface is parallel to the attraction surface, in the present embodiment, a protruding portion is provided between the hole wall and the rotating shaft 3, at least part of the protruding portion is located in the radial direction of the hole wall parallel to the thickness direction of the armature, and the part between the two ends of the hole wall is in contact with the rotating shaft 3 through the protruding portion. The area where the hole wall contacts the rotating shaft through the protruding portion is the contact area.

[0078] When the relay is working, the armature assembly 2 rotates slightly (for example, 1°) around the rotation shaft 3, and the thickness direction of the armature assembly changes slightly. Since at least part of the protruding portion is located in the radial direction of the hole wall that is parallel to the thickness direction of the armature, the protruding portion can cover the range of rotation of the armature assembly 2 around the rotation shaft 3. In this way, it can be ensured that, after the armature assembly 2 rotates slightly around the rotation shaft 3, the part between the two ends of the hole wall can still provide a certain clamping force on the rotation shaft 3 in the radial direction of the hole wall that is parallel to the arrow direction Y through the protruding portion, so that the armature assembly 2 can swing relative to the attraction surface around the position where the hole wall contacts the rotation shaft 3, thereby achieving self-correction.

[0079] In a possible design of the embodiment, the protruding portion is connected with the hole wall of the shaft hole 211, and at least part of the protruding portion contacts the rotation shaft 3. Since the protruding portion is arranged on the hole wall, when the relay is working, the armature assembly 2 rotates slightly around the rotation shaft 3, and the protruding portion rotates slightly with the armature assembly 2. As long as at least part of the protruding portion is located in the radial direction of the hole wall that is parallel to the thickness direction of the armature and can always contact the rotation shaft 3, it can be ensured that the armature assembly 2 can swing relative to the attraction surface around the position where the hole wall contacts the rotation shaft 3, thereby achieving self-correction.

[0080] In some embodiments, the protruding portion includes two sub-protruding portions that are oppositely arranged in the radial direction of the hole wall that is parallel to the thickness direction of the armature. Referring to Figure 11 For the purpose of clearly describing the technical solutions of the embodiment, the sub-protruding portion arranged on the hole wall is named as the first sub-protruding portion 212.

[0081] Referring to Figures 10 to 12 As shown in the figure, at least part of the two first sub-protruding portions 212 can simultaneously contact the circumferential surface of the rotation shaft 3, thereby providing a clamping force on the rotation shaft 3 at the contact position where the rotation shaft 3 is in zero-gap fit with the hole wall. Through the electromagnetic attraction force, the armature assembly 2 can swing relative to the attraction surface around the position where the hole wall contacts the rotation shaft 3 in the arrow direction AB, thereby achieving self-correction, and further making at least one vertical line on the surface of the armature that faces the attraction surface parallel to the attraction surface. That is, when the armature assembly 2 is located at the first position, at least one vertical line that extends in the arrow direction Y in the pole surface of the first end of the first armature 22 is parallel to the first attraction surface 411 of the core, and at least one vertical line that extends in the arrow direction Y in the pole surface of the second end of the second armature 23 is parallel to the second attraction surface 412 of the core. When the armature assembly 2 is located at the second position, at least one vertical line that extends in the arrow direction Y in the pole surface of the second end of the first armature 22 is parallel to the first attraction surface 411 of the core, and at least one vertical line that extends in the arrow direction Y in the pole surface of the first end of the second armature 23 is parallel to the second attraction surface 412 of the core.

[0082] It should be noted that, in the arrow direction X, the circumferential surface of the rotating shaft 3 and the hole wall can be gap arranged, that is, the protruding portion can not be arranged in the arrow direction X.

[0083] In some embodiments, the number of the first sub-protruding portions 212 can also be greater than two, as long as two of the first sub-protruding portions 212 are oppositely arranged along the radial direction of the hole wall which is parallel to the thickness direction of the armature.

[0084] In other embodiments, the protruding portion can also be a ring-shaped protrusion. At least the part of the ring-shaped protrusion located in the radial direction of the hole wall which is parallel to the arrow direction Z is in contact with the rotating shaft 3 to achieve self-correction. That is, the part of the ring-shaped protrusion located in the radial direction of the hole wall which is parallel to the arrow direction X can not be in contact with the rotating shaft 3.

[0085] In this possible design, the surface of the protruding portion is a curved surface, the radial distance between the curved surface and the circumferential surface of the rotating shaft 3 first decreases and then increases along the axial direction of the rotating shaft 3, and the minimum radial distance between the curved surface and the circumferential surface of the rotating shaft 3 is zero. In this way, the middle part of the curved surface can be in contact with the rotating shaft 3, and the two ends of the hole wall of the shaft hole 211 are gap fitted with the rotating shaft 3, thereby reducing the mutual interference between the rotating shaft 3 and the hole wall. When the armature assembly 2 is tilted due to the influence of gravity, the armature assembly 2 can swing relative to the attraction surface along the arrow direction AB around the position where the protruding portion is in contact with the rotating shaft 3 through electromagnetic attraction, thereby achieving self-correction, and further making the surface of the armature facing the attraction surface have at least one vertical line parallel to the attraction surface.

[0086] It should be understood that the radial distance between the curved surface and the circumferential surface of the rotating shaft 3 first decreases and then increases along the axial direction of the rotating shaft 3, which can be decreased to zero and then immediately increased, or can be decreased to zero and then kept a small gap fitting for a short period of time and then increased.

[0087] In some embodiments, referring to Figure 11 , the curved surface is an arc-shaped surface 2121 which is tangent to the circumferential surface of the rotating shaft 3; the arc-shaped surface 2121 extends from one end of the hole wall to the other end. In an example, the curvature of the arc-shaped surface 2121 is small, and the arc-shaped surface 2121 can also be approximately considered as zero gap fitted with the circumferential surface of the rotating shaft 3 near the positions on both sides of the tangent position of the arc-shaped surface 2121 and the circumferential surface of the rotating shaft 3, which can alleviate the wear between the protruding portion and the rotating shaft 3 caused by the small contact area (for example, point contact).

[0088] In other embodiments, referring to Figure 13 , the arc-shaped surface 2121 can also be located at a position between the two ends in the axial direction of the hole wall.

[0089] In this possible design, the axial length of the part of the hole wall in contact with the rotating shaft 3 is not greater than 0.2 mm. In this way, a certain space for movement between the rotating shaft 3 and the hole wall can be ensured to realize self-correction.

[0090] In this possible design, as shown in Figure 14 The curved surface includes a first inclined surface 2122, a connecting surface 2123 and a second inclined surface 2124 arranged in sequence, the first inclined surface 2122 and the second inclined surface 2124 are arranged at an angle, and the connecting surface 2123 is in contact with the rotating shaft 3.

[0091] For example, the angle between the first inclined surface 2122 and the second inclined surface 2124 is obtuse, the first inclined surface 2122 extends from one end of the hole wall away from the base 1, and the second inclined surface 2124 extends from the position connected with the connecting surface 2123 to one end of the hole wall close to the base 1.

[0092] For example, the axial length of the connecting surface 2123 is not greater than 0.2 mm.

[0093] It should be noted that the first inclined surface 2122, the connecting surface 2123 and the second inclined surface 2124 can also be located between the two ends of the hole wall of the rotating shaft 3.

[0094] In this possible design, the protruding part is integrally formed with the hole wall of the shaft hole 211. In this way, it is convenient for production and processing, and also convenient for assembly of the rotating shaft 3 and the shaft hole 211.

[0095] It should be noted that during processing, the part of the hole wall that does not need to be in contact with the rotating shaft 3 can also be thinned, so that the un-thinned part forms a protruding part in contact with the rotating shaft 3.

[0096] In this possible design, the protruding part is located at the middle position of the hole wall. Specifically, the shaft hole 211 on the injection molded part 21 is a through hole, the shaft hole 211 has a set axial depth, and the protruding part is located at the midpoint of the axial depth of the hole wall. In this way, the protruding part can be in contact with the middle position of the part of the rotating shaft 3 located in the shaft hole 211, so that the armature assembly 2 can swing relatively smoothly around the position where the protruding part is in contact with the rotating shaft 3 relative to the attraction surface, the swing angle and swing amplitude are relatively uniform, and the self-correction effect of the rotating shaft 3 is better.

[0097] In another possible design of the present embodiment, the protruding part is connected with the rotating shaft 3, and the protruding part is in contact with the part between the two ends of the hole wall.

[0098] Due to the protrusion arranged on the rotating shaft 3, when the relay is working, the armature assembly 2 rotates slightly around the rotating shaft 3, at this time, the position of the protrusion does not change, the part between the two ends of the hole wall can always provide a certain clamping force on the rotating shaft 3 in the radial direction of the hole wall parallel to the arrow direction Y through the protrusion, so as to ensure that the armature assembly 2 can swing around the position where the hole wall and the rotating shaft 3 are in contact relative to the attraction surface, thereby realizing self-correction.

[0099] In some embodiments, the protrusion includes two sub-protrusions, and the two sub-protrusions are arranged opposite to each other in the radial direction of the rotating shaft 3 parallel to the thickness direction of the armature. Referring to Figure 18 As shown, in order to clearly describe the technical solutions of the present embodiment, the sub-protrusions arranged on the rotating shaft 3 are named as second sub-protrusions 31. In the state where the armature assembly 2 does not tilt, the axis of the rotating shaft 3 coincides with the axis of the shaft hole 211, and therefore, the two second sub-protrusions 31 are also arranged opposite to each other in the radial direction of the hole wall parallel to the thickness direction of the armature.

[0100] The hole wall is in contact with the circumferential surface of the rotating shaft 3 through the two second sub-protrusions 31, thereby providing a clamping force on the rotating shaft 3 at the contact position where the rotating shaft 3 is in zero-gap fit with the hole wall. Through the electromagnetic attraction force, the armature assembly 2 can swing around the position where the hole wall and the second sub-protrusions 31 are in contact relative to the attraction surface in the arrow direction AB, thereby realizing self-correction, and further making at least one vertical line extending in the arrow direction Y in the pole surface of the first end of the first armature 22 parallel to the first attraction surface 411 of the iron core, at least one vertical line extending in the arrow direction Y in the pole surface of the second end of the second armature 23 parallel to the second attraction surface 412 of the iron core, or making at least one vertical line extending in the arrow direction Y in the pole surface of the second end of the first armature 22 parallel to the first attraction surface 411 of the iron core, at least one vertical line extending in the arrow direction Y in the pole surface of the first end of the second armature 23 parallel to the second attraction surface 412 of the iron core.

[0101] Referring to Figures 15 to 17 As shown, in the arrow direction X, a gap is arranged between the circumferential surface of the rotating shaft 3 and the hole wall, that is, the protrusion can not be arranged in the arrow direction X.

[0102] It should be noted that the number of the second sub-protrusions 31 can also be greater than two, as long as two of the second sub-protrusions 31 are arranged opposite to each other in the radial direction of the rotating shaft 3 parallel to the thickness direction of the armature.

[0103] In other embodiments, the protrusion can also be a ring-shaped protrusion. At least the part of the ring-shaped protrusion in the radial direction of the rotating shaft 3 parallel to the arrow direction Z is in contact with the hole wall, so as to realize self-correction.

[0104] In the other possible design, the surface of the protruding part is a curved surface, the radial distance between the curved surface and the hole wall decreases first and then increases along the axial direction of the hole wall, and the minimum radial distance between the curved surface and the circumferential surface of the hole wall is zero. In this way, the middle part of the curved surface can be ensured to be in contact with the hole wall, and the two ends of the hole wall of the shaft hole 211 are in clearance fit with the rotating shaft 3, thereby reducing the mutual interference between the rotating shaft 3 and the hole wall. When the armature assembly 2 is tilted under the influence of gravity, the armature assembly 2 can swing relative to the attraction surface around the position where the protruding part is in contact with the hole wall in the direction of the arrow AB by the electromagnetic attraction, so as to realize self-correction, and further make the surface of the armature facing the attraction surface have at least one vertical line parallel to the attraction surface.

[0105] It should be understood that the radial distance between the curved surface and the hole wall decreases first and then increases along the axial direction of the hole wall, which can decrease to zero and then increase immediately, or decrease to zero and then keep a small clearance fit for a short period of time and then increase.

[0106] In the other possible design, the curved surface is an arc surface, and the arc surface is tangent to the part between the two ends of the hole wall. The axial length of the part of the arc surface in contact with the hole wall is not greater than 0.2 mm.

[0107] It should be noted that the curved surface can also include a first inclined surface, a connecting surface and a second inclined surface, the first inclined surface and the second inclined surface are arranged at an angle, and the connecting surface is in contact with the hole wall. For example, the angle between the first inclined surface and the second inclined surface is an obtuse angle, and the first inclined surface, the connecting surface and the second inclined surface can all be located between the two ends of the hole wall of the rotating shaft 3. In this way, the required raw materials for manufacturing the rotating shaft 3 can be reduced, the production cost can be reduced, and the total weight of the product can be reduced.

[0108] For example, the axial length of the connecting surface is not greater than 0.2 mm.

[0109] When the rotating shaft 3 is assembled in the shaft hole 211, the protruding part corresponds to the middle position of the hole wall, so that the armature assembly 2 can swing more smoothly relative to the attraction surface around the position where the protruding part is in contact with the rotating shaft 3, the swing angle and the swing amplitude are more uniform, and the self-correction effect of the rotating shaft 3 is better.

[0110] In the other possible design, the protruding part is integrally formed with the rotating shaft 3. In this way, the production and processing are facilitated, and the assembly of the rotating shaft 3 and the shaft hole 211 is also facilitated.

[0111] It can be understood that the various embodiments / implementation modes provided by the present application can be combined with each other without contradiction, and will not be illustrated one by one here.

[0112] In the description of the application embodiments, it should be understood that the terms "first", "second", "third" are only used for descriptive purpose and are not used to indicate or imply relative importance. The term "multiple" means two or more, unless otherwise specifically limited. The terms "mount", "connect", "connection", "fixed", and the like should be understood broadly, for example, "connection" can be fixed connection, or detachable connection, or integral connection; "connection" can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the application embodiments can be understood according to the specific circumstances.

[0113] In the description of the application embodiments, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the application embodiments.

[0114] In the description of the application embodiments, the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application embodiments. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0115] The above is only the preferred embodiment of the application embodiments, and is not used to limit the application embodiments. For those skilled in the art, the application embodiments can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A relay characterized by comprising: The application relates to a magnetic switch comprising: a base provided with a rotating shaft and an iron core having an attracting surface; an armature assembly comprising an injection molded part and an armature partially covered by the injection molded part, the injection molded part being provided with a shaft hole through which the rotating shaft is arranged to pass, the armature assembly being capable of rotating relative to the rotating shaft; the shaft hole and the rotating shaft being in contact only at a contact area between the shaft hole and the rotating shaft, the armature assembly being capable of swinging relative to the attracting surface about the contact area so that when the armature assembly is rotated into place relative to the rotating shaft, at least one vertical line on a surface of the armature facing the attracting surface is parallel to the attracting surface, wherein the vertical line is parallel to an axial direction of the shaft hole.

2. The relay according to claim 1, characterized in that A protrusion is arranged between a hole wall of the shaft hole and the rotating shaft, at least a part of the protrusion being located in a radial direction of the hole wall parallel to a thickness direction of the armature, the part between two ends of the hole wall being in contact with the rotating shaft through the protrusion.

3. The relay according to claim 2, characterized in that The protrusion is connected with the hole wall of the shaft hole, at least a part of the protrusion being in contact with the rotating shaft.

4. The relay according to claim 3, characterized in that A surface of the protrusion is a curved surface, a radial distance between the curved surface and a circumferential surface of the rotating shaft first decreasing and then increasing along an axial direction of the rotating shaft, and a minimum radial distance between the curved surface and the circumferential surface of the rotating shaft being zero.

5. The relay of claim 4, wherein The curved surface is an arc surface, the arc surface being tangent to the circumferential surface of the rotating shaft. The arc surface extends from one end of the hole wall to the other end of the hole wall, or the arc surface is located between the two ends of the hole wall.

6. The relay of claim 4, wherein The curved surface comprises a first inclined surface, a connecting surface and a second inclined surface arranged in sequence, an angle between the first inclined surface and the second inclined surface being arranged, and the connecting surface being in contact with the rotating shaft.

7. The relay of claim 3, wherein The protrusion is integrally formed with the hole wall of the shaft hole.

8. The relay of claim 2, wherein The protrusion is connected with the rotating shaft, and the protrusion is in contact with the part between the two ends of the hole wall.

9. The relay according to claim 8, characterized in that A surface of the protrusion is a curved surface, a radial distance between the curved surface and the hole wall first decreasing and then increasing along an axial direction of the hole wall, and a minimum radial distance between the curved surface and the hole wall being zero.

10. The relay of claim 9, wherein The curved surface is an arc surface, the arc surface being tangent to the part between the two ends of the hole wall.

11. The relay of claim 8, wherein The protrusion is integrally formed with the rotating shaft.

12. The relay according to any one of claims 2 to 11, characterized in that The protrusion is located at a middle position of the hole wall.

13. The relay according to any one of claims 2 to 11, characterized in that The protrusion comprises two sub-protrusions, the two sub-protrusions being oppositely arranged along a radial direction of the hole wall parallel to a thickness direction of the armature.

14. The relay according to any one of claims 2 to 11, characterized in that The protrusion is a ring-shaped protrusion.

15. The relay according to any one of claims 1 to 11, characterized in that The shaft hole is located on one side of the thickness direction of the armature, and the shaft hole is located between the two ends of the length direction of the armature, wherein the length direction and the thickness direction of the armature are perpendicular to each other.

16. The relay according to any one of claims 1 to 11, characterized in that An axial length of the part of the hole wall of the shaft hole in contact with the rotating shaft is not greater than 0.2 mm.

17. The relay according to any one of claims 1 to 11, characterized in that The contact area is located between the two ends of the axial direction of the hole wall of the shaft hole.

18. The relay according to any one of claims 1 to 11, characterized in that The armature comprises a first armature and a second armature, the first armature and the second armature are arranged in parallel along the thickness direction of the armature, the iron core is located between the first armature and the second armature, the iron core comprises a first iron core and a second iron core, the first iron core is located between the first end of the first armature and the first end of the second armature, and the second iron core is located between the second end of the first armature and the second end of the second armature; The armature assembly can rotate around the rotating shaft to rotate the armature assembly between a first position and a second position, wherein when the armature assembly is located at the first position, the surface of the first end of the first armature facing the attracting surface of the first iron core has at least one vertical line parallel to the attracting surface of the first iron core, and the surface of the second end of the second armature facing the attracting surface of the second iron core has at least one vertical line parallel to the attracting surface of the second iron core; when the armature assembly is located at the second position, the surface of the second end of the first armature facing the attracting surface of the second iron core has at least one vertical line parallel to the attracting surface of the second iron core, and the surface of the first end of the second armature facing the attracting surface of the first iron core has at least one vertical line parallel to the attracting surface of the first iron core.

19. The relay according to any one of claims 1 to 11, characterized in that The base is provided with a coil holder, the iron core is connected with the coil holder, the iron core is provided with a magnetic isolation part, the armature can be overlapped with the magnetic isolation part, and the magnetic isolation part is welded with the iron core, or the magnetic isolation part is integrally formed with the coil holder.

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